panda.log.MDC Maven / Gradle / Ivy
package panda.log;
import java.util.HashMap;
import java.util.Map;
/**
* The MDC class provides mapped diagnostic contexts.
* A Mapped Diagnostic Context, or MDC in short, is an instrument for distinguishing interleaved log output from different sources.
* Log output is typically interleaved when a server handles multiple clients near-simultaneously.
*
* The MDC is managed on a per thread basis.
* A child thread automatically inherits a copy of the mapped diagnostic context of its parent.
*/
public class MDC {
private static final ThreadLocal> tlm = new ThreadLocal>() {
@Override
protected Map initialValue() {
return new HashMap();
}
};
public static Object put(String key, Object obj) {
return tlm.get().put(key, obj);
}
public static Object get(String key) {
return tlm.get().get(key);
}
public static Object remove(String key) {
return tlm.get().remove(key);
}
public static Map map() {
return tlm.get();
}
}